No - we get the data from CRT. and its usually a complete mess (like repeated licence information, or just crap data) which we need to clean and then merge into the existing data set - so a boat name with the same index will get bits of data replaced, a new boat name on an existing index will get added as a new boat - if the names are obviously different (can't go on not being identical because of the quality of the data so we have to apply Soundexing and Metaphones to names and then cross check)
But yes people leach the data - I've had to put code into stop people basically hitting the site with consecutive CRT licence numbers.